Another form of emergency lighting is the "inverter system". These type of systems are used mostly in larger building. They allow the use of regular AC lighting with a back-up power source. We have serviced inverters for over 20 years also. These system are more difficult to maintain because they normally have a larger quantity of batteries and higher voltages. Brandt Services, Inc. can provide the proper maintenance for your inverter. Because if for no other reason than the cost of the replacement batteries it is more than worth the few dollars a year for a bi-annual full system inspection and test. We can setup a service agreement which will state what we are expected to do during the time of the inspection and how often to perform the inspection. Please contact us for more information about the service agreement or performing a system inspection and test.